Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Leke Lin"'
Publikováno v:
Atmosphere, Vol 15, Iss 9, p 1041 (2024)
Atmospheric ducts play a critical role in the propagation of electromagnetic waves by minimizing signal loss and extending transmission distances, which is essential for radar, communication, and navigation systems. This study leverages meteorologica
Externí odkaz:
https://doaj.org/article/61fdafde093845fb906311ac110b9f51
Publikováno v:
IET Microwaves, Antennas & Propagation, Vol 17, Iss 8, Pp 634-641 (2023)
Abstract Accurate prediction of rain attenuation is critical for the design of terrestrial line‐of‐sight link systems above 5 GHz, particularly for millimetre‐wave frequency. Anomalous behaviour in the adjustment factor in existing rain attenua
Externí odkaz:
https://doaj.org/article/b2e3fabc01aa49fb964af1f844d22fde
Publikováno v:
International Journal of Antennas and Propagation, Vol 2024 (2024)
The parabolic equation (PE) model is effective for predicting signal propagation over irregular terrains. The shift map method of the PE model is highly accurate and widely used for terrain propagation predictions. The maximum propagation angle is a
Externí odkaz:
https://doaj.org/article/ae3ab9e2f22544a69f11adeb38f7db11
Publikováno v:
International Journal of Antennas and Propagation, Vol 2022 (2022)
Rain height is crucial for rain attenuation prediction along slant paths, such as Earth-space links. The global digital map of the mean annual rain height is given in Recommendation ITU-R P.839-4. The disadvantage of this model is that heavy rainfall
Externí odkaz:
https://doaj.org/article/aad864a80bee4c479fc052efbf1c6fd6
Publikováno v:
International Journal of Antennas and Propagation, Vol 2021 (2021)
The millimeter-wave (mmWave) and massive multiple-input multiple-output (MIMO) wireless communication technologies provide vital means to resolve many technical challenges of the fifth-generation (5G) or beyond 5G (B5G) network. Analyzing the measure
Externí odkaz:
https://doaj.org/article/adcad6bfd5a24618aeb7d8896b48927f
Publikováno v:
International Journal of Antennas and Propagation, Vol 2020 (2020)
In some frequency-sharing studies between fixed service and space radiocommunication services, including fixed-satellite, broadcasting-satellite, and space science services, it is necessary to estimate the apparent elevation angle of a space station,
Externí odkaz:
https://doaj.org/article/7de3ac9e961e4168819cf0c00d9b330e
Publikováno v:
Nanomaterials, Vol 12, Iss 2, p 251 (2022)
In this article, we study the optical force exerted on nanorods. In recent years, the capture of micro-nanoparticles has been a frontier topic in optics. A Photonic Jet (PJ) is an emerging subwavelength beam with excellent application prospects. This
Externí odkaz:
https://doaj.org/article/eb8e83439cf54137b81d8501c1aef0bb
Publikováno v:
Earth, Planets and Space, Vol 70, Iss 1, Pp 1-14 (2018)
Abstract Ionospheric irregularities are an important phenomenon in scientific studies and applications of radio-wave propagation. Spread-F echoes in ionograms are a type of high-frequency band irregularities that include frequency spread-F (FSF), ran
Externí odkaz:
https://doaj.org/article/ea26a3e72d5441f59c7cb1ea9416f1ef
Publikováno v:
Atmosphere, Vol 12, Iss 11, p 1468 (2021)
Atmospheric radio refractivity has an obvious influence on the signal transmission path and communication group delay effect. The uncertainty of water vapor distribution is the main reason for the large error of tropospheric refractive index modeling
Externí odkaz:
https://doaj.org/article/4a5e92dba71946bbacaa69c5ab3fc33f
Researching on the Deterministic Channel Models for Urban Microcells Considering Diffraction Effects
Publikováno v:
Energies, Vol 14, Iss 8, p 2143 (2021)
Deterministic channel models, such as the three-dimensional (3D) ray launching method, can yield wireless channel parameters. In the non-line-of-sight (NLOS) propagation, the outdoor 3D ray launching method that considers diffraction effects is more
Externí odkaz:
https://doaj.org/article/e53f744f93484567a32d2bf8ffaed86a